What is a legal requirement of chemigation systems?

• A. Device to prevent backflow
• B. Electrical grounding
• C. FDA approval
• D. Automatic shutoff at tank empty

Answer: (A)

When chemigation is used, protecting the water supply from pesticide contamination is essential. A backflow prevention device is required because it stops any backward flow of irrigation water or chemical solution into the source water when pressure changes or the system malfunctions. This safeguard prevents contaminants from siphoning back into drinking water or other parts of the supply, satisfying legal protection rules for chemigation systems. The device is installed on the water source line, properly maintained, and tested as required by regulations, which is why it’s the correct choice.

Grounding is important for electrical safety in equipment, but it isn’t a chemigation-specific legal requirement for the system itself. FDA approval pertains to the pesticide product, not the chemical injection equipment. Automatic shutoff at tank empty is a useful safety feature, but not a universal legal requirement for chemigation systems.